Where would you be most likely to find the oldest rocks on earth

Some cratons in Canada and Greenland shelter the oldest continental rocks in the world, about 4 billion years old. Other cratons in South Africa, Australia and Asia have continental rocks that are 3 billion years old. The oldest seafloor is comparatively very young, approximately 280 million years old.

Bedrock along the northeast coast of Hudson Bay, Canada.

Explanation:Canadian bedrock more than 4 billion years old may be the oldest known section of the Earth's early crust.